<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRole">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(it1, in1) in scope.row.children"
              :key="it1.id"
              :class="['bdbottom', in1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, it1.id)">
                  {{ it1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <el-col :span="19">
                <!-- 二级 -->
                <el-row
                  v-for="(it2, in2) in it1.children"
                  :key="it2.id"
                  :class="[in2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, it2.id)"
                    >
                      {{ it2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <!-- 三级 -->
                    <el-tag
                      type="warning"
                      v-for="it3 in it2.children"
                      :key="it3.id"
                      closable
                      @close="removeRightById(scope.row, it3.id)"
                    >
                      {{ it3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <el-tree
        :data="rightsList"
        :props="treeProps"
        ref="treeRef"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加/编辑角色对话框 -->
    <el-dialog
      :title="hasTitle"
      :visible.sync="AddRoleDialogVisible"
      width="40%"
      @close="addRoleDialogClosed"
    >
      <el-form
        :model="addRoleForm"
        ref="addRoleFormRef"
        :rules="addRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  name: "",
  data() {
    return {
      // 所有角色列表
      rolesList: [],
      AddRoleDialogVisible: false,
      addRoleForm: {
        roleName: "",
        roleDesc: "",
      },
      hasTitle: "",
      //   添加角色表单验证
      addRoleFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },

      //分配权限
      setRightDialogVisible: false,
      defKeys: [],
      // 权限列表
      rightsList: [],
      //  树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //   当前即将分配权限的Id
      roleId: 0,
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const res = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolesList = res.data;
    },
    addRoleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields();
    },
    //增
    addRole() {
      this.AddRoleDialogVisible = true;
      this.hasId = "";
      this.hasTitle = "新增角色";
      this.addRoleForm = {
        roleName: "",
        roleDesc: "",
      };
    },
    addRoles() {
      this.$refs.addRoleFormRef.validate(async (valid) => {
        if (valid && !this.hasId) {
          const addres = await this.$http.post("/roles", this.addRoleForm);
          if (addres.meta.status !== 201) {
            this.$message.error("添加角色失败！");
          }
          this.$message.success("添加角色成功！");
          this.AddRoleDialogVisible = false;
          this.getRolesList();
        } else if (valid && this.hasId) {
          const edres = await this.$http.put(
            "roles/" + this.hasId,
            this.addRoleForm
          );
          if (edres.meta.status !== 200) {
            return this.$message.error("更新角色信息失败！");
          }
          // 隐藏编辑角色对话框
          this.AddRoleDialogVisible = false;
          this.$message.success("更新角色信息成功！");
          this.getRolesList();
        }
      });
    },
    //编
    showEditDialog(e) {
      this.AddRoleDialogVisible = true;
      this.hasId = e.id;
      this.hasTitle = "编辑角色";
      (this.addRoleForm.roleName = e.roleName),
        (this.addRoleForm.roleDesc = e.roleDesc);
      console.log(e);
    },
    // 删除角色
    async removeRoleById(id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const res = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) return this.$message.error("删除角色失败！");
      this.$message.success("删除用户成功！");
      this.getRolesList();
    },
    //删除权限
    async removeRightById(role, rightId) {
      // 弹框提示 删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      // 点击确定 返回值为：confirm
      // 点击取消 返回值为： cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消权限删除");
      }
      const res = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      role.children = res.data;
      //   不建议使用
      // this.getRolesList()
    },
    //分配权限
    async showSetRightDialog(role) {
      // 获取角色的所有权限
      this.roleId = role.id;
      const res = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败！");
      }

      //   获取权限树
      this.rightsList = res.data;

      //   调用递归获取三级节点的id
      this.getLeafkeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归 获取角色下三级权限的 id, 并保存到defKeys数组
    getLeafkeys(node, arr) {
      if (!node.children) {
        //不存在children就是三级节点
        return arr.push(node.id);
      }
      //存在就循环 递归
      node.children.forEach((item) => this.getLeafkeys(item, arr));
    },
    setRightDialogClosed() {
      this.defKeys = [];
    },
    //权限提交
    async allotRights() {
      //获取当前选中和半选中的id
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      // join() 方法用于把数组中的所有元素放入一个字符串
      const idStr = keys.join(",");
      const res = await this.$http.post(`roles/${this.roleId}/rights`, {
        rids: idStr,
      });
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败！");
      }
      this.$message.success("分配权限成功!");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
  },
};
</script>
<style>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
